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Comparing AnyEvent-HTTP/HTTP.pm (file contents):
Revision 1.52 by root, Sat Sep 26 10:13:12 2009 UTC vs.
Revision 1.65 by root, Fri Dec 31 03:47:32 2010 UTC

… …
43 43
44use Errno (); 44use Errno ();
45 45
46use AnyEvent 5.0 (); 46use AnyEvent 5.0 ();
47use AnyEvent::Util (); 47use AnyEvent::Util ();
48use AnyEvent::Socket ();
49use AnyEvent::Handle (); 48use AnyEvent::Handle ();
50 49
51use base Exporter::; 50use base Exporter::;
52 51
53our $VERSION = '1.43'; 52our $VERSION = '1.5';
54 53
55our @EXPORT = qw(http_get http_post http_head http_request); 54our @EXPORT = qw(http_get http_post http_head http_request);
56 55
57our $USERAGENT = "Mozilla/5.0 (compatible; U; AnyEvent-HTTP/$VERSION; +http://software.schmorp.de/pkg/AnyEvent)"; 56our $USERAGENT = "Mozilla/5.0 (compatible; U; AnyEvent-HTTP/$VERSION; +http://software.schmorp.de/pkg/AnyEvent)";
58our $MAX_RECURSE = 10; 57our $MAX_RECURSE = 10;
… …
92must be an absolute http or https URL. 91must be an absolute http or https URL.
93 92
94When called in void context, nothing is returned. In other contexts, 93When called in void context, nothing is returned. In other contexts,
95C<http_request> returns a "cancellation guard" - you have to keep the 94C<http_request> returns a "cancellation guard" - you have to keep the
96object at least alive until the callback get called. If the object gets 95object at least alive until the callback get called. If the object gets
97destroyed before the callbakc is called, the request will be cancelled. 96destroyed before the callback is called, the request will be cancelled.
98 97
99The callback will be called with the response body data as first argument 98The callback will be called with the response body data as first argument
100(or C<undef> if an error occured), and a hash-ref with response headers as 99(or C<undef> if an error occured), and a hash-ref with response headers as
101second argument. 100second argument.
102 101
103All the headers in that hash are lowercased. In addition to the response 102All the headers in that hash are lowercased. In addition to the response
104headers, the "pseudo-headers" C<HTTPVersion>, C<Status> and C<Reason> 103headers, the "pseudo-headers" (uppercase to avoid clashing with possible
104response headers) C<HTTPVersion>, C<Status> and C<Reason> contain the
105contain the three parts of the HTTP Status-Line of the same name. The 105three parts of the HTTP Status-Line of the same name. If an error occurs
106during the body phase of a request, then the original C<Status> and
107C<Reason> values from the header are available as C<OrigStatus> and
108C<OrigReason>.
109
106pseudo-header C<URL> contains the original URL (which can differ from the 110The pseudo-header C<URL> contains the actual URL (which can differ from
107requested URL when following redirects). 111the requested URL when following redirects - for example, you might get
112an error that your URL scheme is not supported even though your URL is a
113valid http URL because it redirected to an ftp URL, in which case you can
114look at the URL pseudo header).
115
116The pseudo-header C<Redirect> only exists when the request was a result
117of an internal redirect. In that case it is an array reference with
118the C<($data, $headers)> from the redirect response. Note that this
119response could in turn be the result of a redirect itself, and C<<
120$headers->{Redirect}[1]{Redirect} >> will then contain the original
121response, and so on.
108 122
109If the server sends a header multiple times, then their contents will be 123If the server sends a header multiple times, then their contents will be
110joined together with a comma (C<,>), as per the HTTP spec. 124joined together with a comma (C<,>), as per the HTTP spec.
111 125
112If an internal error occurs, such as not being able to resolve a hostname, 126If an internal error occurs, such as not being able to resolve a hostname,
… …
199connect (for exmaple, to bind it on a given IP address). This parameter 213connect (for exmaple, to bind it on a given IP address). This parameter
200overrides the prepare callback passed to C<AnyEvent::Socket::tcp_connect> 214overrides the prepare callback passed to C<AnyEvent::Socket::tcp_connect>
201and behaves exactly the same way (e.g. it has to provide a 215and behaves exactly the same way (e.g. it has to provide a
202timeout). See the description for the C<$prepare_cb> argument of 216timeout). See the description for the C<$prepare_cb> argument of
203C<AnyEvent::Socket::tcp_connect> for details. 217C<AnyEvent::Socket::tcp_connect> for details.
218
219=item tcp_connect => $callback->($host, $service, $connect_cb, $prepare_cb)
220
221In even rarer cases you want total control over how AnyEvent::HTTP
222establishes connections. Normally it uses L<AnyEvent::Socket::tcp_connect>
223to do this, but you can provide your own C<tcp_connect> function -
224obviously, it has to follow the same calling conventions, except that it
225may always return a connection guard object.
226
227There are probably lots of weird uses for this function, starting from
228tracing the hosts C<http_request> actually tries to connect, to (inexact
229but fast) host => IP address caching or even socks protocol support.
204 230
205=item on_header => $callback->($headers) 231=item on_header => $callback->($headers)
206 232
207When specified, this callback will be called with the header hash as soon 233When specified, this callback will be called with the header hash as soon
208as headers have been successfully received from the remote server (not on 234as headers have been successfully received from the remote server (not on
… …
326 push @{ $CO_SLOT{$_[0]}[1] }, $_[1]; 352 push @{ $CO_SLOT{$_[0]}[1] }, $_[1];
327 353
328 _slot_schedule $_[0]; 354 _slot_schedule $_[0];
329} 355}
330 356
331our $qr_nl = qr{\015?\012};
332our $qr_nlnl = qr{(?<![^\012])\015?\012}; 357our $qr_nlnl = qr{(?<![^\012])\015?\012};
333 358
334our $TLS_CTX_LOW = { cache => 1, sslv2 => 1 }; 359our $TLS_CTX_LOW = { cache => 1, sslv2 => 1 };
335our $TLS_CTX_HIGH = { cache => 1, verify => 1, verify_peername => "https" }; 360our $TLS_CTX_HIGH = { cache => 1, verify => 1, verify_peername => "https" };
336 361
… …
349 while (my ($k, $v) = each %$hdr) { 374 while (my ($k, $v) = each %$hdr) {
350 $hdr{lc $k} = $v; 375 $hdr{lc $k} = $v;
351 } 376 }
352 } 377 }
353 378
379 # pseudo headers for all subsequent responses
380 my @pseudo = (URL => $url);
381 push @pseudo, Redirect => delete $arg{Redirect} if exists $arg{Redirect};
382
354 my $recurse = exists $arg{recurse} ? delete $arg{recurse} : $MAX_RECURSE; 383 my $recurse = exists $arg{recurse} ? delete $arg{recurse} : $MAX_RECURSE;
355 384
356 return $cb->(undef, { Status => 599, Reason => "Too many redirections", URL => $url }) 385 return $cb->(undef, { @pseudo, Status => 599, Reason => "Too many redirections" })
357 if $recurse < 0; 386 if $recurse < 0;
358 387
359 my $proxy = $arg{proxy} || $PROXY; 388 my $proxy = $arg{proxy} || $PROXY;
360 my $timeout = $arg{timeout} || $TIMEOUT; 389 my $timeout = $arg{timeout} || $TIMEOUT;
361 390
362 my ($uscheme, $uauthority, $upath, $query, $fragment) = 391 my ($uscheme, $uauthority, $upath, $query, $fragment) =
363 $url =~ m|(?:([^:/?#]+):)?(?://([^/?#]*))?([^?#]*)(?:\?([^#]*))?(?:#(.*))?|; 392 $url =~ m|(?:([^:/?#]+):)?(?://([^/?#]*))?([^?#]*)(?:(\?[^#]*))?(?:#(.*))?|;
364 393
365 $uscheme = lc $uscheme; 394 $uscheme = lc $uscheme;
366 395
367 my $uport = $uscheme eq "http" ? 80 396 my $uport = $uscheme eq "http" ? 80
368 : $uscheme eq "https" ? 443 397 : $uscheme eq "https" ? 443
369 : return $cb->(undef, { Status => 599, Reason => "Only http and https URL schemes supported", URL => $url }); 398 : return $cb->(undef, { @pseudo, Status => 599, Reason => "Only http and https URL schemes supported" });
370 399
371 $uauthority =~ /^(?: .*\@ )? ([^\@:]+) (?: : (\d+) )?$/x 400 $uauthority =~ /^(?: .*\@ )? ([^\@:]+) (?: : (\d+) )?$/x
372 or return $cb->(undef, { Status => 599, Reason => "Unparsable URL", URL => $url }); 401 or return $cb->(undef, { @pseudo, Status => 599, Reason => "Unparsable URL" });
373 402
374 my $uhost = $1; 403 my $uhost = $1;
375 $uport = $2 if defined $2; 404 $uport = $2 if defined $2;
376 405
377 $hdr{host} = defined $2 ? "$uhost:$2" : "$uhost"; 406 $hdr{host} = defined $2 ? "$uhost:$2" : "$uhost"
407 unless exists $hdr{host};
378 408
379 $uhost =~ s/^\[(.*)\]$/$1/; 409 $uhost =~ s/^\[(.*)\]$/$1/;
380 $upath .= "?$query" if length $query; 410 $upath .= $query if length $query;
381 411
382 $upath =~ s%^/?%/%; 412 $upath =~ s%^/?%/%;
383 413
384 # cookie processing 414 # cookie processing
385 if (my $jar = $arg{cookie_jar}) { 415 if (my $jar = $arg{cookie_jar}) {
… …
428 458
429 # leave out fragment and query string, just a heuristic 459 # leave out fragment and query string, just a heuristic
430 $hdr{referer} ||= "$uscheme://$uauthority$upath" unless exists $hdr{referer}; 460 $hdr{referer} ||= "$uscheme://$uauthority$upath" unless exists $hdr{referer};
431 $hdr{"user-agent"} ||= $USERAGENT unless exists $hdr{"user-agent"}; 461 $hdr{"user-agent"} ||= $USERAGENT unless exists $hdr{"user-agent"};
432 462
433 $hdr{"content-length"} = length $arg{body}; 463 $hdr{"content-length"} = length $arg{body}
464 if length $arg{body} || $method ne "GET";
434 465
435 my %state = (connect_guard => 1); 466 my %state = (connect_guard => 1);
436 467
437 _get_slot $uhost, sub { 468 _get_slot $uhost, sub {
438 $state{slot_guard} = shift; 469 $state{slot_guard} = shift;
439 470
440 return unless $state{connect_guard}; 471 return unless $state{connect_guard};
441 472
442 $state{connect_guard} = AnyEvent::Socket::tcp_connect $rhost, $rport, sub { 473 my $connect_cb = sub {
443 $state{fh} = shift 474 $state{fh} = shift
444 or do { 475 or do {
445 my $err = "$!"; 476 my $err = "$!";
446 %state = (); 477 %state = ();
447 return $cb->(undef, { Status => 599, Reason => $err, URL => $url }); 478 return $cb->(undef, { @pseudo, Status => 599, Reason => $err });
448 }; 479 };
449 480
450 pop; # free memory, save a tree 481 pop; # free memory, save a tree
451 482
452 return unless delete $state{connect_guard}; 483 return unless delete $state{connect_guard};
453 484
454 # get handle 485 # get handle
455 $state{handle} = new AnyEvent::Handle 486 $state{handle} = new AnyEvent::Handle
456 fh => $state{fh}, 487 fh => $state{fh},
488 peername => $rhost,
489 tls_ctx => $arg{tls_ctx},
490 # these need to be reconfigured on keepalive handles
457 timeout => $timeout, 491 timeout => $timeout,
458 peername => $rhost, 492 on_error => sub {
459 tls_ctx => $arg{tls_ctx}; 493 %state = ();
494 $cb->(undef, { @pseudo, Status => 599, Reason => $_[2] });
495 },
496 on_eof => sub {
497 %state = ();
498 $cb->(undef, { @pseudo, Status => 599, Reason => "Unexpected end-of-file" });
499 },
500 ;
460 501
461 # limit the number of persistent connections 502 # limit the number of persistent connections
462 # keepalive not yet supported 503 # keepalive not yet supported
463 if ($KA_COUNT{$_[1]} < $MAX_PERSISTENT_PER_HOST) { 504# if ($KA_COUNT{$_[1]} < $MAX_PERSISTENT_PER_HOST) {
464 ++$KA_COUNT{$_[1]}; 505# ++$KA_COUNT{$_[1]};
465 $state{handle}{ka_count_guard} = AnyEvent::Util::guard { 506# $state{handle}{ka_count_guard} = AnyEvent::Util::guard {
466 --$KA_COUNT{$_[1]} 507# --$KA_COUNT{$_[1]}
467 }; 508# };
468 $hdr{connection} = "keep-alive"; 509# $hdr{connection} = "keep-alive";
469 } else { 510# } else {
470 delete $hdr{connection}; 511 delete $hdr{connection};
471 } 512# }
472
473 # (re-)configure handle
474 $state{handle}->on_error (sub {
475 %state = ();
476 $cb->(undef, { Status => 599, Reason => $_[2], URL => $url });
477 });
478 $state{handle}->on_eof (sub {
479 %state = ();
480 $cb->(undef, { Status => 599, Reason => "Unexpected end-of-file", URL => $url });
481 });
482 513
483 $state{handle}->starttls ("connect") if $rscheme eq "https"; 514 $state{handle}->starttls ("connect") if $rscheme eq "https";
484 515
485 # handle actual, non-tunneled, request 516 # handle actual, non-tunneled, request
486 my $handle_actual_request = sub { 517 my $handle_actual_request = sub {
… …
492 . (join "", map "\u$_: $hdr{$_}\015\012", grep defined $hdr{$_}, keys %hdr) 523 . (join "", map "\u$_: $hdr{$_}\015\012", grep defined $hdr{$_}, keys %hdr)
493 . "\015\012" 524 . "\015\012"
494 . (delete $arg{body}) 525 . (delete $arg{body})
495 ); 526 );
496 527
528 # return if error occured during push_write()
529 return unless %state;
530
497 %hdr = (); # reduce memory usage, save a kitten 531 %hdr = (); # reduce memory usage, save a kitten, also make it possible to re-use
498 532
499 # status line 533 # status line and headers
500 $state{handle}->push_read (line => $qr_nl, sub { 534 $state{handle}->push_read (line => $qr_nlnl, sub {
501 $_[1] =~ /^HTTP\/([0-9\.]+) \s+ ([0-9]{3}) (?: \s+ ([^\015\012]*) )?/ix 535 my $keepalive = pop;
502 or return (%state = (), $cb->(undef, { Status => 599, Reason => "Invalid server response ($_[1])", URL => $url }));
503 536
504 my %hdr = ( # response headers
505 HTTPVersion => ",$1",
506 Status => ",$2",
507 Reason => ",$3",
508 URL => ",$url"
509 );
510
511 # headers, could be optimized a bit
512 $state{handle}->unshift_read (line => $qr_nlnl, sub {
513 for ("$_[1]") { 537 for ("$_[1]") {
514 y/\015//d; # weed out any \015, as they show up in the weirdest of places. 538 y/\015//d; # weed out any \015, as they show up in the weirdest of places.
515 539
540 /^HTTP\/([0-9\.]+) \s+ ([0-9]{3}) (?: \s+ ([^\015\012]*) )? \015?\012/igxc
541 or return (%state = (), $cb->(undef, { @pseudo, Status => 599, Reason => "Invalid server response" }));
542
543 push @pseudo,
544 HTTPVersion => $1,
545 Status => $2,
546 Reason => $3,
547 ;
548
516 # things seen, not parsed: 549 # things seen, not parsed:
517 # p3pP="NON CUR OTPi OUR NOR UNI" 550 # p3pP="NON CUR OTPi OUR NOR UNI"
518 551
519 $hdr{lc $1} .= ",$2" 552 $hdr{lc $1} .= ",$2"
520 while /\G 553 while /\G
521 ([^:\000-\037]*): 554 ([^:\000-\037]*):
522 [\011\040]* 555 [\011\040]*
523 ((?: [^\012]+ | \012[\011\040] )*) 556 ((?: [^\012]+ | \012[\011\040] )*)
524 \012 557 \012
525 /gxc; 558 /gxc;
526 559
527 /\G$/ 560 /\G$/
528 or return (%state = (), $cb->(undef, { Status => 599, Reason => "Garbled response headers", URL => $url })); 561 or return (%state = (), $cb->(undef, { @pseudo, Status => 599, Reason => "Garbled response headers" }));
562 }
563
564 # remove the "," prefix we added to all headers above
565 substr $_, 0, 1, ""
566 for values %hdr;
567
568 # patch in all pseudo headers
569 %hdr = (%hdr, @pseudo);
570
571 # redirect handling
572 # microsoft and other shitheads don't give a shit for following standards,
573 # try to support some common forms of broken Location headers.
574 if ($hdr{location} !~ /^(?: $ | [^:\/?\#]+ : )/x) {
575 $hdr{location} =~ s/^\.\/+//;
576
577 my $url = "$rscheme://$uhost:$uport";
578
579 unless ($hdr{location} =~ s/^\///) {
580 $url .= $upath;
581 $url =~ s/\/[^\/]*$//;
529 } 582 }
530 583
531 substr $_, 0, 1, ""
532 for values %hdr;
533
534 # redirect handling
535 # microsoft and other shitheads don't give a shit for following standards,
536 # try to support some common forms of broken Location headers.
537 if ($hdr{location} !~ /^(?: $ | [^:\/?\#]+ : )/x) {
538 $hdr{location} =~ s/^\.\/+//;
539
540 my $url = "$rscheme://$uhost:$uport";
541
542 unless ($hdr{location} =~ s/^\///) {
543 $url .= $upath;
544 $url =~ s/\/[^\/]*$//;
545 }
546
547 $hdr{location} = "$url/$hdr{location}"; 584 $hdr{location} = "$url/$hdr{location}";
585 }
586
587 my $redirect;
588
589 if ($recurse) {
590 my $status = $hdr{Status};
591
592 # industry standard is to redirect POST as GET for
593 # 301, 302 and 303, in contrast to http/1.0 and 1.1.
594 # also, the UA should ask the user for 301 and 307 and POST,
595 # industry standard seems to be to simply follow.
596 # we go with the industry standard.
597 if ($status == 301 or $status == 302 or $status == 303) {
598 # HTTP/1.1 is unclear on how to mutate the method
599 $method = "GET" unless $method eq "HEAD";
600 $redirect = 1;
601 } elsif ($status == 307) {
602 $redirect = 1;
548 } 603 }
604 }
549 605
550 my $redirect; 606 my $finish = sub { # ($data, $err_status, $err_reason[, $keepalive])
607 $state{handle}->destroy if $state{handle};
608 %state = ();
551 609
610 if (defined $_[1]) {
611 $hdr{OrigStatus} = $hdr{Status}; $hdr{Status} = $_[1];
612 $hdr{OrigReason} = $hdr{Reason}; $hdr{Reason} = $_[2];
613 }
614
615 # set-cookie processing
552 if ($recurse) { 616 if ($arg{cookie_jar}) {
553 if ($hdr{Status} =~ /^30[12]$/ && $method ne "POST") { 617 for ($hdr{"set-cookie"}) {
554 # apparently, mozilla et al. just change POST to GET here 618 # parse NAME=VALUE
555 # more research is needed before we do the same 619 my @kv;
620
621 while (/\G\s* ([^=;,[:space:]]+) \s*=\s* (?: "((?:[^\\"]+|\\.)*)" | ([^=;,[:space:]]*) )/gcxs) {
556 $redirect = 1; 622 my $name = $1;
557 } elsif ($hdr{Status} == 303) { 623 my $value = $3;
558 # even http/1.1 is unclear on how to mutate the method 624
559 $method = "GET" unless $method eq "HEAD"; 625 unless ($value) {
626 $value = $2;
627 $value =~ s/\\(.)/$1/gs;
628 }
629
630 push @kv, $name => $value;
631
632 last unless /\G\s*;/gc;
633 }
634
635 last unless @kv;
636
637 my $name = shift @kv;
638 my %kv = (value => shift @kv, @kv);
639
640 my $cdom;
641 my $cpath = (delete $kv{path}) || "/";
642
643 if (exists $kv{domain}) {
644 $cdom = delete $kv{domain};
645
646 $cdom =~ s/^\.?/./; # make sure it starts with a "."
647
648 next if $cdom =~ /\.$/;
649
650 # this is not rfc-like and not netscape-like. go figure.
651 my $ndots = $cdom =~ y/.//;
652 next if $ndots < ($cdom =~ /\.[^.][^.]\.[^.][^.]$/ ? 3 : 2);
653 } else {
654 $cdom = $uhost;
655 }
656
560 $redirect = 1; 657 # store it
561 } elsif ($hdr{Status} == 307 && $method =~ /^(?:GET|HEAD)$/) { 658 $arg{cookie_jar}{version} = 1;
562 $redirect = 1; 659 $arg{cookie_jar}{$cdom}{$cpath}{$name} = \%kv;
660
661 redo if /\G\s*,/gc;
563 } 662 }
564 } 663 }
565 664
566 my $finish = sub { 665 if ($redirect && exists $hdr{location}) {
567 $state{handle}->destroy if $state{handle}; 666 # we ignore any errors, as it is very common to receive
568 %state = (); 667 # Content-Length != 0 but no actual body
569 668 # we also access %hdr, as $_[1] might be an erro
570 # set-cookie processing 669 http_request (
571 if ($arg{cookie_jar}) { 670 $method => $hdr{location},
572 for ($_[1]{"set-cookie"}) {
573 # parse NAME=VALUE
574 my @kv;
575
576 while (/\G\s* ([^=;,[:space:]]+) \s*=\s* (?: "((?:[^\\"]+|\\.)*)" | ([^=;,[:space:]]*) )/gcxs) {
577 my $name = $1;
578 my $value = $3;
579
580 unless ($value) {
581 $value = $2;
582 $value =~ s/\\(.)/$1/gs;
583 } 671 %arg,
672 recurse => $recurse - 1,
673 Redirect => [$_[0], \%hdr],
674 $cb);
675 } else {
676 $cb->($_[0], \%hdr);
677 }
678 };
584 679
585 push @kv, $name => $value; 680 my $len = $hdr{"content-length"};
586 681
587 last unless /\G\s*;/gc; 682 if (!$redirect && $arg{on_header} && !$arg{on_header}(\%hdr)) {
683 $finish->(undef, 598 => "Request cancelled by on_header");
684 } elsif (
685 $hdr{Status} =~ /^(?:1..|204|205|304)$/
686 or $method eq "HEAD"
687 or (defined $len && !$len)
688 ) {
689 # no body
690 $finish->("", undef, undef, 1);
691 } else {
692 # body handling, four different code paths
693 # for want_body_handle, on_body (2x), normal (2x)
694 # we might read too much here, but it does not matter yet (no pipelining)
695 if (!$redirect && $arg{want_body_handle}) {
696 $_[0]->on_eof (undef);
697 $_[0]->on_error (undef);
698 $_[0]->on_read (undef);
699
700 $finish->(delete $state{handle});
701
702 } elsif ($arg{on_body}) {
703 $_[0]->on_error (sub { $finish->(undef, 599 => $_[2]) });
704 if ($len) {
705 $_[0]->on_read (sub {
706 $len -= length $_[0]{rbuf};
707
708 $arg{on_body}(delete $_[0]{rbuf}, \%hdr)
709 or $finish->(undef, 598 => "Request cancelled by on_body");
710
588 } 711 $len > 0
589 712 or $finish->("", undef, undef, 1);
590 last unless @kv;
591
592 my $name = shift @kv;
593 my %kv = (value => shift @kv, @kv);
594
595 my $cdom;
596 my $cpath = (delete $kv{path}) || "/";
597
598 if (exists $kv{domain}) {
599 $cdom = delete $kv{domain};
600
601 $cdom =~ s/^\.?/./; # make sure it starts with a "."
602
603 next if $cdom =~ /\.$/;
604
605 # this is not rfc-like and not netscape-like. go figure.
606 my $ndots = $cdom =~ y/.//;
607 next if $ndots < ($cdom =~ /\.[^.][^.]\.[^.][^.]$/ ? 3 : 2);
608 } else {
609 $cdom = $uhost;
610 }
611
612 # store it
613 $arg{cookie_jar}{version} = 1;
614 $arg{cookie_jar}{$cdom}{$cpath}{$name} = \%kv;
615
616 redo if /\G\s*,/gc;
617 } 713 });
714 } else {
715 $_[0]->on_eof (sub {
716 $finish->("");
717 });
718 $_[0]->on_read (sub {
719 $arg{on_body}(delete $_[0]{rbuf}, \%hdr)
720 or $finish->(undef, 598 => "Request cancelled by on_body");
721 });
618 } 722 }
723 } else {
724 $_[0]->on_eof (undef);
619 725
620 if ($redirect && exists $hdr{location}) { 726 if ($len) {
621 # we ignore any errors, as it is very common to receive 727 $_[0]->on_error (sub { $finish->(undef, 599 => $_[2]) });
622 # Content-Length != 0 but no actual body 728 $_[0]->on_read (sub {
623 # we also access %hdr, as $_[1] might be an erro 729 $finish->((substr delete $_[0]{rbuf}, 0, $len, ""), undef, undef, 1)
624 http_request ($method => $hdr{location}, %arg, recurse => $recurse - 1, $cb); 730 if $len <= length $_[0]{rbuf};
731 });
625 } else { 732 } else {
626 $cb->($_[0], $_[1]);
627 }
628 };
629
630 my $len = $hdr{"content-length"};
631
632 if (!$redirect && $arg{on_header} && !$arg{on_header}(\%hdr)) {
633 $finish->(undef, { Status => 598, Reason => "Request cancelled by on_header", URL => $url });
634 } elsif (
635 $hdr{Status} =~ /^(?:1..|[23]04)$/
636 or $method eq "HEAD"
637 or (defined $len && !$len)
638 ) {
639 # no body
640 $finish->("", \%hdr);
641 } else {
642 # body handling, four different code paths
643 # for want_body_handle, on_body (2x), normal (2x)
644 # we might read too much here, but it does not matter yet (no pers. connections)
645 if (!$redirect && $arg{want_body_handle}) {
646 $_[0]->on_eof (undef);
647 $_[0]->on_error (undef);
648 $_[0]->on_read (undef);
649
650 $finish->(delete $state{handle}, \%hdr);
651
652 } elsif ($arg{on_body}) {
653 $_[0]->on_error (sub { $finish->(undef, { Status => 599, Reason => $_[2], URL => $url }) });
654 if ($len) {
655 $_[0]->on_eof (undef);
656 $_[0]->on_read (sub {
657 $len -= length $_[0]{rbuf};
658
659 $arg{on_body}(delete $_[0]{rbuf}, \%hdr)
660 or $finish->(undef, { Status => 598, Reason => "Request cancelled by on_body", URL => $url });
661
662 $len > 0
663 or $finish->("", \%hdr);
664 });
665 } else {
666 $_[0]->on_eof (sub {
667 $finish->("", \%hdr);
668 });
669 $_[0]->on_read (sub {
670 $arg{on_body}(delete $_[0]{rbuf}, \%hdr)
671 or $finish->(undef, { Status => 598, Reason => "Request cancelled by on_body", URL => $url });
672 });
673 }
674 } else {
675 $_[0]->on_eof (undef);
676
677 if ($len) {
678 $_[0]->on_error (sub { $finish->(undef, { Status => 599, Reason => $_[2], URL => $url }) });
679 $_[0]->on_read (sub {
680 $finish->((substr delete $_[0]{rbuf}, 0, $len, ""), \%hdr)
681 if $len <= length $_[0]{rbuf};
682 });
683 } else {
684 $_[0]->on_error (sub { 733 $_[0]->on_error (sub {
685 $! == Errno::EPIPE || !$! 734 ($! == Errno::EPIPE || !$!)
686 ? $finish->(delete $_[0]{rbuf}, \%hdr) 735 ? $finish->(delete $_[0]{rbuf})
687 : $finish->(undef, { Status => 599, Reason => $_[2], URL => $url }); 736 : $finish->(undef, 599 => $_[2]);
688 }); 737 });
689 $_[0]->on_read (sub { }); 738 $_[0]->on_read (sub { });
690 }
691 } 739 }
692 } 740 }
693 }); 741 }
694 }); 742 });
695 }; 743 };
696 744
697 # now handle proxy-CONNECT method 745 # now handle proxy-CONNECT method
698 if ($proxy && $uscheme eq "https") { 746 if ($proxy && $uscheme eq "https") {
… …
700 748
701 # maybe re-use $uauthority with patched port? 749 # maybe re-use $uauthority with patched port?
702 $state{handle}->push_write ("CONNECT $uhost:$uport HTTP/1.0\015\012Host: $uhost\015\012\015\012"); 750 $state{handle}->push_write ("CONNECT $uhost:$uport HTTP/1.0\015\012Host: $uhost\015\012\015\012");
703 $state{handle}->push_read (line => $qr_nlnl, sub { 751 $state{handle}->push_read (line => $qr_nlnl, sub {
704 $_[1] =~ /^HTTP\/([0-9\.]+) \s+ ([0-9]{3}) (?: \s+ ([^\015\012]*) )?/ix 752 $_[1] =~ /^HTTP\/([0-9\.]+) \s+ ([0-9]{3}) (?: \s+ ([^\015\012]*) )?/ix
705 or return (%state = (), $cb->(undef, { Status => 599, Reason => "Invalid proxy connect response ($_[1])", URL => $url })); 753 or return (%state = (), $cb->(undef, { @pseudo, Status => 599, Reason => "Invalid proxy connect response ($_[1])" }));
706 754
707 if ($2 == 200) { 755 if ($2 == 200) {
708 $rpath = $upath; 756 $rpath = $upath;
709 &$handle_actual_request; 757 &$handle_actual_request;
710 } else { 758 } else {
711 %state = (); 759 %state = ();
712 $cb->(undef, { Status => $2, Reason => $3, URL => $url }); 760 $cb->(undef, { @pseudo, Status => $2, Reason => $3 });
713 } 761 }
714 }); 762 });
715 } else { 763 } else {
716 &$handle_actual_request; 764 &$handle_actual_request;
717 } 765 }
766 };
718 767
719 }, $arg{on_prepare} || sub { $timeout }; 768 my $tcp_connect = $arg{tcp_connect}
769 || do { require AnyEvent::Socket; \&AnyEvent::Socket::tcp_connect };
770
771 $state{connect_guard} = $tcp_connect->($rhost, $rport, $connect_cb, $arg{on_prepare} || sub { $timeout });
772
720 }; 773 };
721 774
722 defined wantarray && AnyEvent::Util::guard { %state = () } 775 defined wantarray && AnyEvent::Util::guard { %state = () }
723} 776}
724 777
… …
738 &http_request 791 &http_request
739} 792}
740 793
741=back 794=back
742 795
796=head2 DNS CACHING
797
798AnyEvent::HTTP uses the AnyEvent::Socket::tcp_connect function for
799the actual connection, which in turn uses AnyEvent::DNS to resolve
800hostnames. The latter is a simple stub resolver and does no caching
801on its own. If you want DNS caching, you currently have to provide
802your own default resolver (by storing a suitable resolver object in
803C<$AnyEvent::DNS::RESOLVER>).
804
743=head2 GLOBAL FUNCTIONS AND VARIABLES 805=head2 GLOBAL FUNCTIONS AND VARIABLES
744 806
745=over 4 807=over 4
746 808
747=item AnyEvent::HTTP::set_proxy "proxy-url" 809=item AnyEvent::HTTP::set_proxy "proxy-url"
… …
750string of the form C<http://host:port> (optionally C<https:...>), croaks 812string of the form C<http://host:port> (optionally C<https:...>), croaks
751otherwise. 813otherwise.
752 814
753To clear an already-set proxy, use C<undef>. 815To clear an already-set proxy, use C<undef>.
754 816
817=item $date = AnyEvent::HTTP::format_date $timestamp
818
819Takes a POSIX timestamp (seconds since the epoch) and formats it as a HTTP
820Date (RFC 2616).
821
822=item $timestamp = AnyEvent::HTTP::parse_date $date
823
824Takes a HTTP Date (RFC 2616) and returns the corresponding POSIX
825timestamp, or C<undef> if the date cannot be parsed.
826
755=item $AnyEvent::HTTP::MAX_RECURSE 827=item $AnyEvent::HTTP::MAX_RECURSE
756 828
757The default value for the C<recurse> request parameter (default: C<10>). 829The default value for the C<recurse> request parameter (default: C<10>).
758 830
759=item $AnyEvent::HTTP::USERAGENT 831=item $AnyEvent::HTTP::USERAGENT
… …
777connections. This number of can be useful for load-leveling. 849connections. This number of can be useful for load-leveling.
778 850
779=back 851=back
780 852
781=cut 853=cut
854
855our @month = qw(Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec);
856our @weekday = qw(Sun Mon Tue Wed Thu Fri Sat);
857
858sub format_date($) {
859 my ($time) = @_;
860
861 # RFC 822/1123 format
862 my ($S, $M, $H, $mday, $mon, $year, $wday, $yday, undef) = gmtime $time;
863
864 sprintf "%s, %02d %s %04d %02d:%02d:%02d GMT",
865 $weekday[$wday], $mday, $month[$mon], $year + 1900,
866 $H, $M, $S;
867}
868
869sub parse_date($) {
870 my ($date) = @_;
871
872 my ($d, $m, $y, $H, $M, $S);
873
874 if ($date =~ /^[A-Z][a-z][a-z], ([0-9][0-9]) ([A-Z][a-z][a-z]) ([0-9][0-9][0-9][0-9]) ([0-9][0-9]):([0-9][0-9]):([0-9][0-9]) GMT$/) {
875 # RFC 822/1123, required by RFC 2616
876 ($d, $m, $y, $H, $M, $S) = ($1, $2, $3, $4, $5, $6);
877
878 } elsif ($date =~ /^[A-Z][a-z]+, ([0-9][0-9])-([A-Z][a-z][a-z])-([0-9][0-9]) ([0-9][0-9]):([0-9][0-9]):([0-9][0-9]) GMT$/) {
879 # RFC 850
880 ($d, $m, $y, $H, $M, $S) = ($1, $2, $3 < 69 ? $3 + 2000 : $3 + 1900, $4, $5, $6);
881
882 } elsif ($date =~ /^[A-Z][a-z][a-z] ([A-Z][a-z][a-z]) ([0-9 ][0-9]) ([0-9][0-9]):([0-9][0-9]):([0-9][0-9]) ([0-9][0-9][0-9][0-9])$/) {
883 # ISO C's asctime
884 ($d, $m, $y, $H, $M, $S) = ($2, $1, $6, $3, $4, $5);
885 }
886 # other formats fail in the loop below
887
888 for (0..11) {
889 if ($m eq $month[$_]) {
890 require Time::Local;
891 return Time::Local::timegm ($S, $M, $H, $d, $_, $y);
892 }
893 }
894
895 undef
896}
782 897
783sub set_proxy($) { 898sub set_proxy($) {
784 if (length $_[0]) { 899 if (length $_[0]) {
785 $_[0] =~ m%^(https?):// ([^:/]+) (?: : (\d*) )?%ix 900 $_[0] =~ m%^(https?):// ([^:/]+) (?: : (\d*) )?%ix
786 or Carp::croak "$_[0]: invalid proxy URL"; 901 or Carp::croak "$_[0]: invalid proxy URL";
… …
793# initialise proxy from environment 908# initialise proxy from environment
794eval { 909eval {
795 set_proxy $ENV{http_proxy}; 910 set_proxy $ENV{http_proxy};
796}; 911};
797 912
913=head2 SOCKS PROXIES
914
915Socks proxies are not directly supported by AnyEvent::HTTP. You can
916compile your perl to support socks, or use an external program such as
917F<socksify> (dante) or F<tsocks> to make your program use a socks proxy
918transparently.
919
920Alternatively, for AnyEvent::HTTP only, you can use your own
921C<tcp_connect> function that does the proxy handshake - here is an example
922that works with socks4a proxies:
923
924 use Errno;
925 use AnyEvent::Util;
926 use AnyEvent::Socket;
927 use AnyEvent::Handle;
928
929 # host, port and username of/for your socks4a proxy
930 my $socks_host = "10.0.0.23";
931 my $socks_port = 9050;
932 my $socks_user = "";
933
934 sub socks4a_connect {
935 my ($host, $port, $connect_cb, $prepare_cb) = @_;
936
937 my $hdl = new AnyEvent::Handle
938 connect => [$socks_host, $socks_port],
939 on_prepare => sub { $prepare_cb->($_[0]{fh}) },
940 on_error => sub { $connect_cb->() },
941 ;
942
943 $hdl->push_write (pack "CCnNZ*Z*", 4, 1, $port, 1, $socks_user, $host);
944
945 $hdl->push_read (chunk => 8, sub {
946 my ($hdl, $chunk) = @_;
947 my ($status, $port, $ipn) = unpack "xCna4", $chunk;
948
949 if ($status == 0x5a) {
950 $connect_cb->($hdl->{fh}, (format_address $ipn) . ":$port");
951 } else {
952 $! = Errno::ENXIO; $connect_cb->();
953 }
954 });
955
956 $hdl
957 }
958
959Use C<socks4a_connect> instead of C<tcp_connect> when doing C<http_request>s,
960possibly after switching off other proxy types:
961
962 AnyEvent::HTTP::set_proxy undef; # usually you do not want other proxies
963
964 http_get 'http://www.google.com', tcp_connect => \&socks4a_connect, sub {
965 my ($data, $headers) = @_;
966 ...
967 };
968
798=head1 SEE ALSO 969=head1 SEE ALSO
799 970
800L<AnyEvent>. 971L<AnyEvent>.
801 972
802=head1 AUTHOR 973=head1 AUTHOR

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